Contact-induced spin polarization of monolayer hexagonal boron nitride on Ni(111)

Otomo, Manabu; Yamauchi, Yasushi*; Kuzubov, A. A.*; Eliseeva, N. S.*; Avramov, P.*; Entani, Shiro; Matsumoto, Yoshihiro; Naramoto, Hiroshi*; Sakai, Seiji

Applied Physics Letters, 104(5), p.051604_1 - 051604_4, 2014/02

https://doi.org/10.1063/1.4863324

Hexagonal boron nitride (h-BN) is a promising barrier material for graphene spintronics. In this study, spin-polarized metastable de-excitation spectroscopy (SPMDS) is employed to study the spin-dependent electronic structure of monolayer h-BN on Ni(111). The extreme surface sensitivity of SPMDS enables us to elucidate a partial filling of the in-gap states of h-BN without any superposition of Ni 3 signals. The in-gap states are shown to have a considerable spin polarization parallel to the majority spin of Ni. The positive spin polarization is attributed to the - hybridization and the effective spin transfer to the nitrogen atoms at the h-BN/Ni(111) interface.

Analysis and experimental results on ingress of coolant event in vacuum vessel

Kurihara, Ryoichi; Ajima, Toshio*; Kunugi, Tomoaki; Takase, Kazuyuki; Shibata, Mitsuhiko; Seki, Yasushi; *; Yamauchi, Michinori*; *; *

Fusion Engineering and Design, 42, p.61 - 66, 1998/00

https://doi.org/10.1016/S0920-3796(97)00182-8

no abstracts in English

Proposal of integrated test facility for in-vessel thermofluid safety of fusion reactors

Kurihara, Ryoichi; Seki, Yasushi; Ueda, Shuzo; Aoki, Isao; Nishio, Satoshi; Ajima, Toshio*; Kunugi, Tomoaki; Takase, Kazuyuki; Yamauchi, Michinori*; *; et al.

Journal of Fusion Energy, 16(3), p.225 - 230, 1997/00

https://doi.org/10.1023/A:1021895304522

no abstracts in English

Direct probing of spin polarization in graphene on magnetic metal surface by metastable helium beam

Entani, Shiro; Otomo, Manabu; Kurahashi, Mitsunori*; Matsumoto, Yoshihiro; Avramov, P.; Naramoto, Hiroshi*; Sakai, Seiji; Yamauchi, Yasushi*

no journal, , 

Spin polarization of monolayer hexagonal boron nitride on Ni(111) studied by spin-polarized metastable de-excitation spectroscopy

Otomo, Manabu; Avramov, P.; Entani, Shiro; Matsumoto, Yoshihiro; Naramoto, Hiroshi*; Yamauchi, Yasushi*; Sakai, Seiji

no journal, , 

Hexagonal boron nitride (h-BN) is a promising insulating material for graphene spintronics. In this study, we utilized spin-polarized metastable de-excitation spectroscopy (SPMDS) in order to study spin and electronic states of h-BN on magnetic metal surfaces. The extreme surface sensitivity enabled us to elucidate the spin polarization of h-BN monolayer at Ni(111) contacts separately from that of Ni(111). The spin asymmetry of SPMDS spectra indicates that the h-BN is spin-polarized parallel to Ni majority spins. This result will give us insight into the characteristics of h-BN tunnel barriers in graphene spintronics.

Spin-resolved band structure of hydrogenated hexagonal boron nitride monolayer

Otomo, Manabu; Yamauchi, Yasushi*; Entani, Shiro; Matsumoto, Yoshihiro; Naramoto, Hiroshi*; Sakai, Seiji

no journal, , 

Hexagonal boron nitride (h-BN) is a promising barrier material for graphene spintronics. In this study, the electronic structure of the hydrogenated h-BN was studied by means of spin-polarized metastable de-excitation spectroscopy (SPMDS). The spin polarization of the hydrogenated h-BN was selectively detected due to extreme surface sensitivity of the method. The atomic displacement of boron and nitrogen was also confirmed by X-ray standing wave technique.

Interface properties of graphene-based heterostructures for spintronic applications

Sakai, Seiji; Majumdar, S.*; Entani, Shiro; Naramoto, Hiroshi*; Avramov, P.; Yamauchi, Yasushi*

no journal, , 

Proximity-induced spin polarization in single layer graphene/YIG junctions

Sakai, Seiji; Sorokin, B. P.*; Entani, Shiro; Naramoto, Hiroshi*; Yotsuya, Shintaro*; Ando, Kazuya*; Yamauchi, Yasushi*

no journal, , 

no abstracts in English